⚠ Incident
CLEARED: A major incident closed the M4 between J8/9 (Maidenhead) and J10 (Winnersh) from about 9pm on Wed 9 Sept 2026, after a serious collision. It was cleared on the afternoon of Thu 10 Sept 2026: eastbound reopened at about 2pm and westbound by about 4pm.as at 00:17 Fri 11 Sept 2026
M4 Traffic.co.uk

Latest M4 traffic news, updates & roadworks

M4 Traffic

Latest M4 Traffic News Now

0Accidentsnone reported on the M4 that we are aware of1Roadworks activelive on the M4 right now — see details4Plannedscheduled on the M4 — see details

Live M4 traffic data from National Highways · updated 19:22 Sat 12 Sept 2026

M4

Search M4 Traffic.co.uk

Welcome to the M4 traffic search news page.

Helping you find the latest M4 traffic news and updates.

We hope that the traffic news will help you avoid traffic jams and roadworks.

Our traffic news is designed to provide you with traffic news in a clear and informative way.

You can use the filter options below to find the latest traffic news for the M4 journey you are planning to take.

16 matching items - showing 1-10 of 16 total available news items

  • A34 S CLOSED AFTER A303

    On the signs now Road closed
    Time now: Saturday, 12 September 2026, 19:22

    19:0812 Sept 2026set 13 min ago✓ Checked by us 19:22

    A34 S CLOSED
    AFTER A303

    Overhead sign

    On 16 signs on the M4 and M25, including M4 westbound between J8 and J10. On the signs since at least 12:57 Sat 12 Sept 2026.

    We check these overhead signs at least every five minutes, but we can't guarantee a sign is still current if an incident or issue has been cleared and the sign has not been updated yet.

  • A34 CLOSED AFTER A303

    On the signs now Road closed
    Time now: Saturday, 12 September 2026, 19:22

    18:0412 Sept 2026set 1 hr ago✓ Checked by us 19:22

    A34 CLOSED
    AFTER A303

    Overhead sign

    On 5 signs on the M4, including M4 eastbound between J16 and J15. On the signs since at least 12:56 Sat 12 Sept 2026.

    We check these overhead signs at least every five minutes, but we can't guarantee a sign is still current if an incident or issue has been cleared and the sign has not been updated yet.

  • Hardshoulder closure

    Active nowRoadworksEastbound
    Time now: Saturday, 12 September 2026, 19:22

    19:1612 Sept 2026reported 5 min ago

    Location
    M4 eastbound between J17 and J16
    Direction
    Eastbound
    Lanes closed
    Hard shoulder closed
    Reason
    Roadworks
    Schedule
    23:59 Tue 27 Apr 2021 → 18:00 Fri 30 July 2027
    ⏳Long-term works - HA planned end: 18:00 Fri 30 July 2027.

  • Queue ahead

    WarningEastboundBetween J17 & J16

    19:1612 Sept 2026set 5 min ago✓ Checked by us 19:22

    QUEUE
    AHEAD

    Overhead sign

    We check these overhead signs at least every five minutes, but we can't guarantee a sign is still current if an incident or issue has been cleared and the sign has not been updated yet.

  • Red X means lane closed

    WarningEastboundBetween J6 & J5

    19:1412 Sept 2026set 7 min ago✓ Checked by us 19:22

    RED X MEANS
    LANE CLOSED

    Overhead sign

    We check these overhead signs at least every five minutes, but we can't guarantee a sign is still current if an incident or issue has been cleared and the sign has not been updated yet.

  • Queue ahead

    WarningWestboundBetween J13 & J14

    19:0812 Sept 2026set 13 min ago✓ Checked by us 19:22

    QUEUE
    AHEAD

    Overhead sign

    We check these overhead signs at least every five minutes, but we can't guarantee a sign is still current if an incident or issue has been cleared and the sign has not been updated yet.

  • Vehicle fire SLOW DOWN

    WarningEastboundBetween J17 & J164 signs here

    18:4412 Sept 2026set 37 min ago✓ Checked by us 19:22

    VEHICLE FIRE
    SLOW DOWN

    Overhead sign

    We check these overhead signs at least every five minutes, but we can't guarantee a sign is still current if an incident or issue has been cleared and the sign has not been updated yet.

  • Obstruction on slip road

    WarningEastboundBetween J13 & J12

    18:4012 Sept 2026set 41 min ago✓ Checked by us 19:22

    OBSTRUCTION
    ON SLIP ROAD

    Overhead sign

    We check these overhead signs at least every five minutes, but we can't guarantee a sign is still current if an incident or issue has been cleared and the sign has not been updated yet.

  • QUEUE CAUTION

    WarningEastboundBetween J3 & J2

    18:3912 Sept 2026set 42 min ago✓ Checked by us 19:22

    QUEUE
    CAUTION

    Overhead sign

    We check these overhead signs at least every five minutes, but we can't guarantee a sign is still current if an incident or issue has been cleared and the sign has not been updated yet.

  • QUEUE AHEAD

    WarningEastboundBetween J3 & J22 signs here

    18:3912 Sept 2026set 42 min ago✓ Checked by us 19:22

    QUEUE
    AHEAD

    Overhead sign

    We check these overhead signs at least every five minutes, but we can't guarantee a sign is still current if an incident or issue has been cleared and the sign has not been updated yet.

    • Updated 19:22 Sat 12 Sept 2026

    Powered by National Highways’ Transport Data Feeds.

    How to find the latest M4 traffic news

    Our live M4 feed updates throughout the day with the latest reports on delays, roadworks, accidents, closures and congestion along the M4 motorway. Search by junction number and direction — eastbound or westbound — to focus on the stretch you’re travelling, whether that’s the M25 interchange at Junction 4b, the Severn crossing, the M5 at Almondsbury, or the run into Cardiff and Swansea. A quick check before you leave can save you sitting in avoidable traffic.

    Why M4 traffic news changes along the motorway

    The Department for Transport counts M4 traffic hour by hour and end to end. What it shows is that the latest M4 news means something different depending on where you are joining the motorway today.

    156,491

    M4 vehicles a day

    at the busiest point, junction 4 by Heathrow — the London commuter end of the M4, where 81% of the traffic is cars.

    128,594

    a day at Bristol

    on the M4 at the M4/M5 interchange — fewer vehicles, but 11,167 lorries and 24,926 vans. The same motorway, carrying a very different kind of traffic.

    32%

    the M4 rush-hour swing

    between the busiest M4 hour (7am) and the quietest (11am) at junction 4. The M4 has a genuine peak, so timing your journey actually helps here.

    81

    M4 count points

    measure this motorway from London to South Wales. It is one of the most closely watched roads in the country, and every M4 accident, delay and roadworks report we publish comes from that network.

    So an M4 delay at junction 4 and an M4 delay at junction 19 are not the same problem. That is why this page carries all the latest M4 traffic news together — accidents, crashes, roadworks and lane closures — so you can find the ones on your stretch of the M4 motorway today rather than reading about somebody else’s.

    Hourly figures are from the Department for Transport’s own M4 count point beside junction 4, counted on 3 September 2025, published 20 May 2026. Daily figures are Average Annual Daily Flow for 2025.

    M4traffic.co.uk is dedicated to the latest M4 traffic news, checked every five minutes, 24 hours a day. The M4 meets the M25 at Junction 4b near Heathrow and the M5 near Bristol — see M25 Traffic and M5 Traffic.